2666143295872 has 128 divisors (see below), whose sum is σ = 6146196537600. Its totient is φ = 1128347289600.

The previous prime is 2666143295831. The next prime is 2666143295891. The reversal of 2666143295872 is 2785923416662.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is a self number, because there is not a number n which added to its sum of digits gives 2666143295872.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 191788122 + ... + 191802022.

It is an arithmetic number, because the mean of its divisors is an integer number (48017160450).

Almost surely, 2^{2666143295872} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2666143295872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3073098268800).

2666143295872 is an abundant number, since it is smaller than the sum of its proper divisors (3480053241728).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2666143295872 is a wasteful number, since it uses less digits than its factorization.

2666143295872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16584 (or 16572 counting only the distinct ones).

The product of its digits is 52254720, while the sum is 61.

The spelling of 2666143295872 in words is "two trillion, six hundred sixty-six billion, one hundred forty-three million, two hundred ninety-five thousand, eight hundred seventy-two".